Arnold,
I have added a new issue to the RDF Issue list about contexts:
http://www.w3.org/2000/03/rdf-tracking/#rdfms-contexts
I have added a reference to this thread under that issue and also under:
http://www.w3.org/2000/03/rdf-tracking/#rdfms-quoting
Brian
Arnold deVos wrote:
>
> Here is a proposal [1] for representing the difference between two RDF
> models as an RDF model. In the electric power industry have a use case for
> this in exchanging power system models between utilities [2]. I would
> imagine there are others who have giant models like us and sometimes need
> to handle only the differences.
>
> Something like this requires quoting of RDF statements. I know this is
> supposed to be covered by rdf:bagID, but I couldn't see how to use that in
> this case without creating a self-contradictory model. Therefore I am
> floating an (application-specific?) extension to the syntax,
> parseType="Statements". This is supposed to be similar to the braces in N3
> [3].
>
> Here is an illustration of a difference model using this extension:
>
> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
> xmlns:cim="http://iec.ch/TC57/2000/CIM-schema-cimu09a#"
> xmlns:dm=http://iec.ch/TC57/2001/Differences>
> <rdf:Description about="">
> <!-- Content: (literal-property|resource-property)* -->
> <dm:preconditions parseType="Statements">
> <!-- Content: (definition|description)* -->
> </dm:preconditions>
> <dm:forwardDifferences parseType="Statements">
> <!-- Content: (definition|description)* -->
> </dm:forwardDifferences>
> <dm:reverseDifferences parseType="Statements">
> <!-- Content: (definition|description)* -->
> </dm:reverseDifferences>
> </rdf:Description>
> </rdf:RDF>
>
> Here is a short definition of the parseType used above:
>
> * The content model of a property element with rdf:parseType="Statements" is
> the same as the content model of the rdf:RDF element.
>
> * The content generates the same RDF statements as if it appeared in an
> rdf:RDF element. Note: these statements may duplicate or contradict others
> outside the enclosing element. RDF processors are not entitled to eliminate
> such duplicates. The statements are in a separate "context".
>
> * The value of a property element with rdf:parseType="Statements" is a
> collection of resources of type rdf:Statement, representing the generated
> statements.
>
> - Arnold
>
> [1] http://www.langdale.com.au/CIMXML/DifferenceModelsR03.pdf (Sorry only in
> PDF for the moment.)
>
> [2] http://www.langdale.com.au/CIMXML
>
> [3] http://www.w3.org/DesignIssues/Notation3.html